What are they using for those "fun" explosions? Do they actually use live ammo? Napalm? ;D
Great series! Lots of variation in the sky!
The use little packets of something - gasoline, I suppose. You might see them in a shot or two. I wish they'd use some tracer rounds for the simulated air combat, it'd be the finishing touch!
However, I can imagine it'd be one more risk and cost in an already risky and costly "hobby". It still would be quite the show, however. 
Any half "explosive" explosion would contain quite a bit of ejecta and you'll notice there's little to no debris. This is almost always the sign of an artsy gasoline explosion. A nice, gasoline explosion results in a virtually nil ejecta level, which is perfectly safe to fly though (obviously, as seen). I can't say the same for early, fabric covered aircraft, however. They might get away with it, but I wouldn't want to be the one to try it!
Most of the aircraft look like the Confederate Air Force. ( Sorry!, The Commemorative Air Force! Being Politically Correct has gotten out of hand! )
